Note 10 - Income Taxes Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Valuation Allowance	$ 65,023	$ 46,892
Effective Income Tax Rate Reconciliation, Remeasurement of Net DTA, Amount	102,617
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount	(786)	(5,534)	$ 5,412
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount	(96)	9,988	(6,674)
Current (benefit) provision	59,122	4,546	120
Deferred income tax (benefit) expense	166,527	170,887	156,170
Income tax (benefit) provision	$ 225,649	$ 175,433	$ 156,290